Now in a mystical manner in proportion to their deserts docs our Lord daily ascend to some men, seeing that the perfect and those whose conversation is in heaven, He glorifies by exalting higher, instructing them in things eternal, and teaching them things which can not be heard by the multitude, but to others he descends, in that He strengthens the earthly and foolish men, teaching and chastening them. Now this demoniac Matthew calls a lunatic; Mark, deaf and dumb. (Matt. 17:15, Mark 9:25.) Matthew signifies those who change as the moon, increasing and decreasing through different vices, Mark those who are dumb in not confessing the faith, deaf in not hearing the very word of faith. While the boy is coming to our Lord, he is dashed to the ground; because men when turned to the Lord are often grievously afflicted by the devil, that he may instil a hatred of virtue, or revenge the injury of his expulsion. As in the beginning of the Church he waged as many fierce conflicts as he had to bewail losses suddenly brought upon His kingdom. But our Lord rebukes not the boy who suffered violence, but the evil spirit who inflicted it; for he who desires to correct the sinner, ought by reproof and abhorrence to drive away the vice, but to revive the man by gentleness, until he can restore him to the spiritual father of the Church.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).